Work Around 'Not Enough Memory' Problem During iOS Update

During a wireless iOS update, you might see a message that says the update can't be installed because it needs more space than you have on your device. If you see this message, there are a few ways you can update your device:

DELETE CONTENT MANUALLY

If there isn't enough space to download and install an update, iOS 9 tries to make more space. It temporarily removes some downloadable parts of installed apps. You shouldn't need to remove or relocate any content. But in some cases, it's necessary to manually delete some content.